Home / 20,958.94-28,938.15-13,900.06

Finding the Fourth Proportional to 20,958.94, 28,938.15 and 13,900.06

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Solution

The fourth proportional to 20,958.94, 28,938.15 and 13,900.06 is: 19,191.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,958.94 : 28,938.15 = 13,900.06 : x
  2. Step 2: Convert to fraction form
    20,958.94/28,938.15 = 13,900.06/x
  3. Step 3: Cross multiply
    20,958.94x = 28,938.15 × 13,900.06
  4. Step 4: Simplify right side
    20,958.94x = 402,242,021.29
  5. Step 5: Solve for x
    x = 402,242,021.29/20,958.94
  6. Step 6: Final answer
    x = 19,191.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.